时间戳转为格式化时间

function date(time) {
    let date = new Date(time);
    let y = date.getFullYear()
    let m = date.getMonth() + 1
    m = m < 10 ? '0' + m : m
    let d = date.getDate()
    d = d < 10 ? ('0' + d) : d
    return y + '-' + m + '-' + d
}